Mill.



No. 707,805. Patented Aug. 26, I902.

' A. THIRIDN.

MILL.

(Application filed Apr. 11, 1901.)

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AUGUSTE THIRION, OF PARIS, FRANCE.

MILL.

SPECIFICATION formingoart of Letters Patent No. 707,805, dated August 26, 1902.

Application filed April 11, 1901. Serial No. 55,342. (No model.)

To all whom it may concern:

Be it known that I, AUGUSTE THIRION, a citizen of the French Republic, and a resident of Paris, France, have invented certain new and useful Improvements in Mills, of which the following is a specification.

The object of my present invention is to provide a mill adapted to grind all kinds of dry or oleaginons grains, chicory,sugar, and the like or any other similar materials, such as cocoons of silkworms.

A further object of the invention is to enable a uniform product to be obtained and to greatly economize the consumption of power byreason of the particular arrangement of the working parts, the improved mill being adapted to be constructed in all sizes, so as to be transportable or not.

The invention consists of the construction and novel combination of parts fully described and claimed hereinafter.

In the accompanying drawings, forming a portion of this specification, Figure 1. is an elevation of a mill constructed in accordance with my invention. Fig. 2 is a vertical central section of same. Fig. 3 shows a modified form of construction.

Referring now to the drawings, and particularly to Figs. 1 and 2, A represents a cylinder, preferably made of cast-iron and provided with a cover-plate B, having two or more air-vents, into one of which is placed the hopper C for the reception of the grains. The cover of said cylinder supports two bearings D D, in which is journaled the actuating-shaft H, carrying pulleys E E and bevel gear-wheel F.

Secured within the mill by means of highpitch screws a is an inverted circular steel cup I, provided with annular rows of teeth with their bodies described on the arc of the annulus, having curved points and arranged like steps, so that their cutting edges are adapted to decorticate and grind grains. Rotatably arranged in said cup I is a cone M, also made of steel and provided with stepped teeth corresponding to the teeth of the cup I and engaging the intermediate spaces between the latter. However, the section of the teeth of the cone is slightly modified with respect to those of the cup in order to en- V V, ada ted to raise or lower the steel bar Q, carrying the bearing R. Said upward or downward movement is not imparted to the pinion F by reason of its specialarrangement, enabling the same to remain in mesh with the wheel F.

Arranged within the mill and above the working parts thereof is a distributor T, receiving grains from the hopper G. Said distrib'uter is secured to and actuated by the vertical shaft N and made of about the same diameter as the cylinder A. The distributor is provided with a suitable wire-cloth, leaving passage for the grains, which are uniformly distributed to the working parts by the rotation of the distributor. This distributer has a dual function, since it receives, supports, and carries around the berries of grain delivered by the hopper, sifting them uniformly and circumferentially into the casing P, and since also it will intercept stones, pieces of hard material, and other objects which might injure the machine and prevent their reaching the grinder.

In order to prevent grains from dropping upon the cup I, a circular casing P is provided, said casing being made of thin sheetiron and yieldingly applied against the inner wall of cylinder A and the upper edge of the cup I.

In the modified form shown in Fig.3 both adjusting-screws V V, the bar Q, the hearing R, and the bearing-point at the lower end of the shaft N are omitted. Said arrangement is substituted by a grooved nut K, into which extends the vertical shaft N. Splined on the latter is the pinion F, and pinned to the lower end of said shaft is the cone M. The actuation of said nut enables the cone M to be brought nearer to the cup I, at the same time insuring the vertical position of the shaft N. The pinion F, being splined to said shaft N, does not partake of its vertical movements,but slides therealongand remains in mesh with, gear-Wheel F, being confined between the bevel of said wheel and its own ball-bearings, below referred to.

Arranged within the nut K is an antifric tion ball-bearing L, supporting the entire weight of the working parts and serving as a substitute to the lower bearing described in connection with Figs. 1 and 2. Said balls are constantly immersed in a suitable lubricant. Another antifriction ball-bearing L is insorted between the pinion F and the coverplate of the cylinder A.

In order to support the grooved nut K and secure the vertical position of the shaft N, I provide an arched frame I, having two sleevesa vertical bearing-sleeve O and horizontal bearing sleeve X-and suitably secured to the plate Q of the cylinder A.

In the modified form the cup I is not secured to the cylinder by means of screws.

The latter are omitted and substituted by four overlapping projections S, two of which are made integral with the cylinder, while the two other projections are made integral with the cup.

Having fully described my invention,what

I claim, and desire to secure by Letters Patent, is-

In the improved grinding-mill, the combination with a cylindrical casing and perforated cover-plate removably secured on the same of a stationary inverted cup Within the casing, stepped annular rows of grindingteeth, having curved bodies described in the arc of the annulus on the inner Wall of said cup, a rotatable grinding-cone arranged in said cup, correspondingly-stepped annular rows of curved grinding-teeth on the outer wall of said cone and extending into the intermediate spaces between the teeth of said cup, a vertical shaft carrying said cone and suitably journaled in bearings, means for actuating said shaft, a hopper mounted on the cover-plate of the casing, a circular screen arranged beneath said hopper and secured to and rotating with said vertical shaft to uniformly distribute grains to the cup and cone, means for preventing grains from dropping upon the upper surface of the cups, and means for adjusting said shaft vertically, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

AUGUSTE THIRION.

Witnesses:

ADOLPHE STURM, EDWARD P. MACLEAN. 

